lib/libfetch/file.c

   1 /*-
   2  * Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/lib/libfetch/file.c,v 1.18 2007/12/14 10:26:58 des Exp $
  29  * $DragonFly: src/lib/libfetch/file.c,v 1.3 2007/08/05 21:48:12 swildner Exp $
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/stat.h>
  34
  35 #include <dirent.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38
  39 #include "fetch.h"
  40 #include "common.h"
  41
  42 FILE *
  43 fetchXGetFile(struct url *u, struct url_stat *us, const char *flags)
  44 {
  45         FILE *f;
  46
  47         if (us && fetchStatFile(u, us, flags) == -1)
  48                 return (NULL);
  49
  50         f = fopen(u->doc, "r");
  51
  52         if (f == NULL)
  53                 fetch_syserr();
  54
  55         if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
  56                 fclose(f);
  57                 fetch_syserr();
  58         }
  59
  60         return (f);
  61 }
  62
  63 FILE *
  64 fetchGetFile(struct url *u, const char *flags)
  65 {
  66         return (fetchXGetFile(u, NULL, flags));
  67 }
  68
  69 FILE *
  70 fetchPutFile(struct url *u, const char *flags)
  71 {
  72         FILE *f;
  73
  74         if (CHECK_FLAG('a'))
  75                 f = fopen(u->doc, "a");
  76         else
  77                 f = fopen(u->doc, "w+");
  78
  79         if (f == NULL)
  80                 fetch_syserr();
  81
  82         if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
  83                 fclose(f);
  84                 fetch_syserr();
  85         }
  86
  87         return (f);
  88 }
  89
  90 static int
  91 fetch_stat_file(const char *fn, struct url_stat *us)
  92 {
  93         struct stat sb;
  94
  95         us->size = -1;
  96         us->atime = us->mtime = 0;
  97         if (stat(fn, &sb) == -1) {
  98                 fetch_syserr();
  99                 return (-1);
 100         }
 101         us->size = sb.st_size;
 102         us->atime = sb.st_atime;
 103         us->mtime = sb.st_mtime;
 104         return (0);
 105 }
 106
 107 int
 108 fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused)
 109 {
 110         return (fetch_stat_file(u->doc, us));
 111 }
 112
 113 struct url_ent *
 114 fetchListFile(struct url *u, const char *flags __unused)
 115 {
 116         struct dirent *de;
 117         struct url_stat us;
 118         struct url_ent *ue;
 119         int size, len;
 120         char fn[PATH_MAX], *p;
 121         DIR *dir;
 122         int l;
 123
 124         if ((dir = opendir(u->doc)) == NULL) {
 125                 fetch_syserr();
 126                 return (NULL);
 127         }
 128
 129         ue = NULL;
 130         strncpy(fn, u->doc, sizeof(fn) - 2);
 131         fn[sizeof(fn) - 2] = 0;
 132         strcat(fn, "/");
 133         p = strchr(fn, 0);
 134         l = sizeof(fn) - strlen(fn) - 1;
 135
 136         while ((de = readdir(dir)) != NULL) {
 137                 strncpy(p, de->d_name, l - 1);
 138                 p[l - 1] = 0;
 139                 if (fetch_stat_file(fn, &us) == -1)
 140                         /* should I return a partial result, or abort? */
 141                         break;
 142                 fetch_add_entry(&ue, &size, &len, de->d_name, &us);
 143         }
 144
 145         return (ue);
 146 }